1 /* $NetBSD: ftp.c,v 1.153 2007/12/05 00:15:25 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1985, 1989, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* 69 * Copyright (C) 1997 and 1998 WIDE Project. 70 * All rights reserved. 71 * 72 * Redistribution and use in source and binary forms, with or without 73 * modification, are permitted provided that the following conditions 74 * are met: 75 * 1. Redistributions of source code must retain the above copyright 76 * notice, this list of conditions and the following disclaimer. 77 * 2. Redistributions in binary form must reproduce the above copyright 78 * notice, this list of conditions and the following disclaimer in the 79 * documentation and/or other materials provided with the distribution. 80 * 3. Neither the name of the project nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 */ 96 97 #include <sys/cdefs.h> 98 #ifndef lint 99 #if 0 100 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 101 #else 102 __RCSID("$NetBSD: ftp.c,v 1.153 2007/12/05 00:15:25 lukem Exp $"); 103 #endif 104 #endif /* not lint */ 105 106 #include <sys/types.h> 107 #include <sys/stat.h> 108 #include <sys/socket.h> 109 #include <sys/time.h> 110 111 #include <netinet/in.h> 112 #include <netinet/in_systm.h> 113 #include <netinet/ip.h> 114 #include <arpa/inet.h> 115 #include <arpa/ftp.h> 116 #include <arpa/telnet.h> 117 118 #include <ctype.h> 119 #include <err.h> 120 #include <errno.h> 121 #include <fcntl.h> 122 #include <netdb.h> 123 #include <stdio.h> 124 #include <stdlib.h> 125 #include <string.h> 126 #include <time.h> 127 #include <unistd.h> 128 #include <stdarg.h> 129 130 #include "ftp_var.h" 131 132 volatile sig_atomic_t abrtflag; 133 volatile sig_atomic_t timeoutflag; 134 135 sigjmp_buf ptabort; 136 int ptabflg; 137 int ptflag = 0; 138 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 139 140 static int empty(FILE *, FILE *, int); 141 142 struct sockinet { 143 union sockunion { 144 struct sockaddr_in su_sin; 145 #ifdef INET6 146 struct sockaddr_in6 su_sin6; 147 #endif 148 } si_su; 149 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 150 int si_len; 151 #endif 152 }; 153 154 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 155 # define su_len si_len 156 #else 157 # define su_len si_su.su_sin.sin_len 158 #endif 159 #define su_family si_su.su_sin.sin_family 160 #define su_port si_su.su_sin.sin_port 161 162 struct sockinet myctladdr, hisctladdr, data_addr; 163 164 char * 165 hookup(char *host, char *port) 166 { 167 int s = -1, error, portnum; 168 struct addrinfo hints, *res, *res0; 169 char hbuf[MAXHOSTNAMELEN]; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 socklen_t len; 172 int on = 1; 173 174 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 175 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 176 memset(&hints, 0, sizeof(hints)); 177 portnum = parseport(port, FTP_PORT); 178 hints.ai_flags = AI_CANONNAME; 179 hints.ai_family = family; 180 hints.ai_socktype = SOCK_STREAM; 181 hints.ai_protocol = 0; 182 error = getaddrinfo(host, NULL, &hints, &res0); 183 if (error) { 184 warnx("Can't lookup `%s': %s", host, 185 (error == EAI_SYSTEM) ? strerror(errno) 186 : gai_strerror(error)); 187 code = -1; 188 return (0); 189 } 190 191 if (res0->ai_canonname) 192 (void)strlcpy(hostnamebuf, res0->ai_canonname, 193 sizeof(hostnamebuf)); 194 else 195 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 196 hostname = hostnamebuf; 197 198 for (res = res0; res; res = res->ai_next) { 199 ai_unmapped(res); 200 if (getnameinfo(res->ai_addr, res->ai_addrlen, 201 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 202 strlcpy(hbuf, "?", sizeof(hbuf)); 203 if (verbose && res0->ai_next) { 204 /* if we have multiple possibilities */ 205 fprintf(ttyout, "Trying %s...\n", hbuf); 206 } 207 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 208 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 209 if (s < 0) { 210 warn("Can't create socket for connection to `%s'", 211 hbuf); 212 continue; 213 } 214 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 215 close(s); 216 s = -1; 217 continue; 218 } 219 220 /* finally we got one */ 221 break; 222 } 223 if (s < 0) { 224 warnx("Can't connect to `%s'", host); 225 code = -1; 226 freeaddrinfo(res0); 227 return 0; 228 } 229 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 230 hisctladdr.su_len = res->ai_addrlen; 231 freeaddrinfo(res0); 232 res0 = res = NULL; 233 234 len = hisctladdr.su_len; 235 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 236 warn("Can't determine my address of connection to `%s'", host); 237 code = -1; 238 goto bad; 239 } 240 myctladdr.su_len = len; 241 242 #ifdef IPTOS_LOWDELAY 243 if (hisctladdr.su_family == AF_INET) { 244 int tos = IPTOS_LOWDELAY; 245 if (setsockopt(s, IPPROTO_IP, IP_TOS, 246 (void *)&tos, sizeof(tos)) == -1) { 247 DWARN("setsockopt %s (ignored)", 248 "IPTOS_LOWDELAY"); 249 } 250 } 251 #endif 252 cin = fdopen(s, "r"); 253 cout = fdopen(s, "w"); 254 if (cin == NULL || cout == NULL) { 255 warnx("Can't fdopen socket"); 256 if (cin) 257 (void)fclose(cin); 258 if (cout) 259 (void)fclose(cout); 260 code = -1; 261 goto bad; 262 } 263 if (verbose) 264 fprintf(ttyout, "Connected to %s.\n", hostname); 265 if (getreply(0) > 2) { /* read startup message from server */ 266 if (cin) 267 (void)fclose(cin); 268 if (cout) 269 (void)fclose(cout); 270 code = -1; 271 goto bad; 272 } 273 274 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 275 (void *)&on, sizeof(on)) == -1) { 276 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 277 } 278 279 return (hostname); 280 bad: 281 (void)close(s); 282 return (NULL); 283 } 284 285 void 286 cmdabort(int notused) 287 { 288 int oerrno = errno; 289 290 sigint_raised = 1; 291 alarmtimer(0); 292 if (fromatty) 293 write(fileno(ttyout), "\n", 1); 294 abrtflag++; 295 if (ptflag) 296 siglongjmp(ptabort, 1); 297 errno = oerrno; 298 } 299 300 void 301 cmdtimeout(int notused) 302 { 303 int oerrno = errno; 304 305 alarmtimer(0); 306 if (fromatty) 307 write(fileno(ttyout), "\n", 1); 308 timeoutflag++; 309 if (ptflag) 310 siglongjmp(ptabort, 1); 311 errno = oerrno; 312 } 313 314 /*VARARGS*/ 315 int 316 command(const char *fmt, ...) 317 { 318 va_list ap; 319 int r; 320 sigfunc oldsigint; 321 322 #ifndef NO_DEBUG 323 if (ftp_debug) { 324 fputs("---> ", ttyout); 325 va_start(ap, fmt); 326 if (strncmp("PASS ", fmt, 5) == 0) 327 fputs("PASS XXXX", ttyout); 328 else if (strncmp("ACCT ", fmt, 5) == 0) 329 fputs("ACCT XXXX", ttyout); 330 else 331 vfprintf(ttyout, fmt, ap); 332 va_end(ap); 333 putc('\n', ttyout); 334 } 335 #endif 336 if (cout == NULL) { 337 warnx("No control connection for command"); 338 code = -1; 339 return (0); 340 } 341 342 abrtflag = 0; 343 344 oldsigint = xsignal(SIGINT, cmdabort); 345 346 va_start(ap, fmt); 347 vfprintf(cout, fmt, ap); 348 va_end(ap); 349 fputs("\r\n", cout); 350 (void)fflush(cout); 351 cpend = 1; 352 r = getreply(!strcmp(fmt, "QUIT")); 353 if (abrtflag && oldsigint != SIG_IGN) 354 (*oldsigint)(SIGINT); 355 (void)xsignal(SIGINT, oldsigint); 356 return (r); 357 } 358 359 static const char *m421[] = { 360 "remote server timed out. Connection closed", 361 "user interrupt. Connection closed", 362 "remote server has closed connection", 363 }; 364 365 int 366 getreply(int expecteof) 367 { 368 char current_line[BUFSIZ]; /* last line of previous reply */ 369 int c, n, line; 370 int dig; 371 int originalcode = 0, continuation = 0; 372 sigfunc oldsigint, oldsigalrm; 373 int pflag = 0; 374 char *cp, *pt = pasv; 375 376 abrtflag = 0; 377 timeoutflag = 0; 378 379 oldsigint = xsignal(SIGINT, cmdabort); 380 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 381 382 for (line = 0 ;; line++) { 383 dig = n = code = 0; 384 cp = current_line; 385 while (alarmtimer(quit_time ? quit_time : 60), 386 ((c = getc(cin)) != '\n')) { 387 if (c == IAC) { /* handle telnet commands */ 388 switch (c = getc(cin)) { 389 case WILL: 390 case WONT: 391 c = getc(cin); 392 fprintf(cout, "%c%c%c", IAC, DONT, c); 393 (void)fflush(cout); 394 break; 395 case DO: 396 case DONT: 397 c = getc(cin); 398 fprintf(cout, "%c%c%c", IAC, WONT, c); 399 (void)fflush(cout); 400 break; 401 default: 402 break; 403 } 404 continue; 405 } 406 dig++; 407 if (c == EOF) { 408 /* 409 * these will get trashed by pswitch() 410 * in lostpeer() 411 */ 412 int reply_timeoutflag = timeoutflag; 413 int reply_abrtflag = abrtflag; 414 415 alarmtimer(0); 416 if (expecteof && feof(cin)) { 417 (void)xsignal(SIGINT, oldsigint); 418 (void)xsignal(SIGALRM, oldsigalrm); 419 code = 221; 420 return (0); 421 } 422 cpend = 0; 423 lostpeer(0); 424 if (verbose) { 425 size_t midx; 426 if (reply_timeoutflag) 427 midx = 0; 428 else if (reply_abrtflag) 429 midx = 1; 430 else 431 midx = 2; 432 (void)fprintf(ttyout, 433 "421 Service not available, %s.\n", m421[midx]); 434 (void)fflush(ttyout); 435 } 436 code = 421; 437 (void)xsignal(SIGINT, oldsigint); 438 (void)xsignal(SIGALRM, oldsigalrm); 439 return (4); 440 } 441 if (c != '\r' && (verbose > 0 || 442 ((verbose > -1 && n == '5' && dig > 4) && 443 (((!n && c < '5') || (n && n < '5')) 444 || !retry_connect)))) { 445 if (proxflag && 446 (dig == 1 || (dig == 5 && verbose == 0))) 447 fprintf(ttyout, "%s:", hostname); 448 (void)putc(c, ttyout); 449 } 450 if (dig < 4 && isdigit(c)) 451 code = code * 10 + (c - '0'); 452 if (!pflag && (code == 227 || code == 228)) 453 pflag = 1; 454 else if (!pflag && code == 229) 455 pflag = 100; 456 if (dig > 4 && pflag == 1 && isdigit(c)) 457 pflag = 2; 458 if (pflag == 2) { 459 if (c != '\r' && c != ')') { 460 if (pt < &pasv[sizeof(pasv) - 1]) 461 *pt++ = c; 462 } else { 463 *pt = '\0'; 464 pflag = 3; 465 } 466 } 467 if (pflag == 100 && c == '(') 468 pflag = 2; 469 if (dig == 4 && c == '-') { 470 if (continuation) 471 code = 0; 472 continuation++; 473 } 474 if (n == 0) 475 n = c; 476 if (cp < ¤t_line[sizeof(current_line) - 1]) 477 *cp++ = c; 478 } 479 if (verbose > 0 || ((verbose > -1 && n == '5') && 480 (n < '5' || !retry_connect))) { 481 (void)putc(c, ttyout); 482 (void)fflush(ttyout); 483 } 484 if (cp[-1] == '\r') 485 cp[-1] = '\0'; 486 *cp = '\0'; 487 if (line == 0) 488 (void)strlcpy(reply_string, current_line, 489 sizeof(reply_string)); 490 if (line > 0 && code == 0 && reply_callback != NULL) 491 (*reply_callback)(current_line); 492 if (continuation && code != originalcode) { 493 if (originalcode == 0) 494 originalcode = code; 495 continue; 496 } 497 if (n != '1') 498 cpend = 0; 499 alarmtimer(0); 500 (void)xsignal(SIGINT, oldsigint); 501 (void)xsignal(SIGALRM, oldsigalrm); 502 if (code == 421 || originalcode == 421) 503 lostpeer(0); 504 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 505 (*oldsigint)(SIGINT); 506 if (timeoutflag && oldsigalrm != cmdtimeout && 507 oldsigalrm != SIG_IGN) 508 (*oldsigalrm)(SIGINT); 509 return (n - '0'); 510 } 511 } 512 513 static int 514 empty(FILE *cin, FILE *din, int sec) 515 { 516 int nr, nfd; 517 struct pollfd pfd[2]; 518 519 nfd = 0; 520 if (cin) { 521 pfd[nfd].fd = fileno(cin); 522 pfd[nfd++].events = POLLIN; 523 } 524 525 if (din) { 526 pfd[nfd].fd = fileno(din); 527 pfd[nfd++].events = POLLIN; 528 } 529 530 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 531 return nr; 532 533 nr = 0; 534 nfd = 0; 535 if (cin) 536 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 537 if (din) 538 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 539 return nr; 540 } 541 542 sigjmp_buf xferabort; 543 544 void 545 abortxfer(int notused) 546 { 547 char msgbuf[100]; 548 size_t len; 549 550 sigint_raised = 1; 551 alarmtimer(0); 552 mflag = 0; 553 abrtflag = 0; 554 switch (direction[0]) { 555 case 'r': 556 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 557 break; 558 case 's': 559 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 560 break; 561 default: 562 errx(1, "abortxfer: unknown direction `%s'", direction); 563 } 564 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 565 sizeof(msgbuf)); 566 write(fileno(ttyout), msgbuf, len); 567 siglongjmp(xferabort, 1); 568 } 569 570 /* 571 * Read data from infd & write to outfd, using buf/bufsize as the temporary 572 * buffer, dealing with short writes. 573 * If rate_limit != 0, rate-limit the transfer. 574 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. 575 * Updates global variables: bytes. 576 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. 577 * In the case of error, errno contains the appropriate error code. 578 */ 579 static int 580 copy_bytes(int infd, int outfd, char *buf, size_t bufsize, 581 int rate_limit, int hash_interval) 582 { 583 volatile off_t hashc; 584 ssize_t inc, outc; 585 char *bufp; 586 struct timeval tvthen, tvnow, tvdiff; 587 off_t bufrem, bufchunk; 588 int serr; 589 590 hashc = hash_interval; 591 if (rate_limit) 592 bufchunk = rate_limit; 593 else 594 bufchunk = bufsize; 595 596 while (1) { 597 if (rate_limit) { 598 (void)gettimeofday(&tvthen, NULL); 599 } 600 errno = 0; 601 inc = outc = 0; 602 /* copy bufchunk at a time */ 603 bufrem = bufchunk; 604 while (bufrem > 0) { 605 inc = read(infd, buf, MIN(bufsize, bufrem)); 606 if (inc <= 0) 607 goto copy_done; 608 bytes += inc; 609 bufrem -= inc; 610 bufp = buf; 611 while (inc > 0) { 612 outc = write(outfd, bufp, inc); 613 if (outc < 0) 614 goto copy_done; 615 inc -= outc; 616 bufp += outc; 617 } 618 if (hash_interval) { 619 while (bytes >= hashc) { 620 (void)putc('#', ttyout); 621 hashc += hash_interval; 622 } 623 (void)fflush(ttyout); 624 } 625 } 626 if (rate_limit) { /* rate limited; wait if necessary */ 627 while (1) { 628 (void)gettimeofday(&tvnow, NULL); 629 timersub(&tvnow, &tvthen, &tvdiff); 630 if (tvdiff.tv_sec > 0) 631 break; 632 usleep(1000000 - tvdiff.tv_usec); 633 } 634 } 635 } 636 637 copy_done: 638 serr = errno; 639 if (hash_interval && bytes > 0) { 640 if (bytes < hash_interval) 641 (void)putc('#', ttyout); 642 (void)putc('\n', ttyout); 643 (void)fflush(ttyout); 644 } 645 errno = serr; 646 if (inc == -1) 647 return 1; 648 if (outc == -1) 649 return 2; 650 651 return 0; 652 } 653 654 void 655 sendrequest(const char *cmd, const char *local, const char *remote, 656 int printnames) 657 { 658 struct stat st; 659 int c; 660 FILE *volatile fin; 661 FILE *volatile dout; 662 int (*volatile closefunc)(FILE *); 663 sigfunc volatile oldintr; 664 sigfunc volatile oldintp; 665 off_t volatile hashbytes; 666 int hash_interval; 667 char *volatile lmode; 668 static size_t bufsize; 669 static char *buf; 670 int oprogress; 671 672 hashbytes = mark; 673 direction = "sent"; 674 dout = NULL; 675 bytes = 0; 676 filesize = -1; 677 oprogress = progress; 678 if (verbose && printnames) { 679 if (*local != '-') 680 fprintf(ttyout, "local: %s ", local); 681 if (remote) 682 fprintf(ttyout, "remote: %s\n", remote); 683 } 684 if (proxy) { 685 proxtrans(cmd, local, remote); 686 return; 687 } 688 if (curtype != type) 689 changetype(type, 0); 690 closefunc = NULL; 691 oldintr = NULL; 692 oldintp = NULL; 693 lmode = "w"; 694 if (sigsetjmp(xferabort, 1)) { 695 while (cpend) 696 (void)getreply(0); 697 code = -1; 698 goto cleanupsend; 699 } 700 (void)xsignal(SIGQUIT, psummary); 701 oldintr = xsignal(SIGINT, abortxfer); 702 if (strcmp(local, "-") == 0) { 703 fin = stdin; 704 progress = 0; 705 } else if (*local == '|') { 706 oldintp = xsignal(SIGPIPE, SIG_IGN); 707 fin = popen(local + 1, "r"); 708 if (fin == NULL) { 709 warn("Can't execute `%s'", local + 1); 710 code = -1; 711 goto cleanupsend; 712 } 713 progress = 0; 714 closefunc = pclose; 715 } else { 716 fin = fopen(local, "r"); 717 if (fin == NULL) { 718 warn("Can't open `%s'", local); 719 code = -1; 720 goto cleanupsend; 721 } 722 closefunc = fclose; 723 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 724 fprintf(ttyout, "%s: not a plain file.\n", local); 725 code = -1; 726 goto cleanupsend; 727 } 728 filesize = st.st_size; 729 } 730 if (initconn()) { 731 code = -1; 732 goto cleanupsend; 733 } 734 if (sigsetjmp(xferabort, 1)) 735 goto abort; 736 737 if (restart_point && 738 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 739 int rc; 740 741 rc = -1; 742 switch (curtype) { 743 case TYPE_A: 744 rc = fseeko(fin, restart_point, SEEK_SET); 745 break; 746 case TYPE_I: 747 case TYPE_L: 748 rc = lseek(fileno(fin), restart_point, SEEK_SET); 749 break; 750 } 751 if (rc < 0) { 752 warn("Can't seek to restart `%s'", local); 753 goto cleanupsend; 754 } 755 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 756 goto cleanupsend; 757 lmode = "r+"; 758 } 759 if (remote) { 760 if (command("%s %s", cmd, remote) != PRELIM) 761 goto cleanupsend; 762 } else { 763 if (command("%s", cmd) != PRELIM) 764 goto cleanupsend; 765 } 766 dirchange = 1; 767 dout = dataconn(lmode); 768 if (dout == NULL) 769 goto abort; 770 771 if (sndbuf_size > bufsize) { 772 if (buf) 773 (void)free(buf); 774 bufsize = sndbuf_size; 775 buf = ftp_malloc(bufsize); 776 } 777 778 progressmeter(-1); 779 oldintp = xsignal(SIGPIPE, SIG_IGN); 780 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 781 782 switch (curtype) { 783 784 case TYPE_I: 785 case TYPE_L: 786 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, 787 rate_put, hash_interval); 788 if (c == 1) { 789 warn("Reading `%s'", local); 790 } else if (c == 2) { 791 if (errno != EPIPE) 792 warn("Writing to network"); 793 bytes = -1; 794 } 795 break; 796 797 case TYPE_A: 798 while ((c = getc(fin)) != EOF) { 799 if (c == '\n') { 800 while (hash_interval && bytes >= hashbytes) { 801 (void)putc('#', ttyout); 802 (void)fflush(ttyout); 803 hashbytes += mark; 804 } 805 if (ferror(dout)) 806 break; 807 (void)putc('\r', dout); 808 bytes++; 809 } 810 (void)putc(c, dout); 811 bytes++; 812 #if 0 /* this violates RFC0959 */ 813 if (c == '\r') { 814 (void)putc('\0', dout); 815 bytes++; 816 } 817 #endif 818 } 819 if (hash_interval) { 820 if (bytes < hashbytes) 821 (void)putc('#', ttyout); 822 (void)putc('\n', ttyout); 823 } 824 if (ferror(fin)) 825 warn("Reading `%s'", local); 826 if (ferror(dout)) { 827 if (errno != EPIPE) 828 warn("Writing to network"); 829 bytes = -1; 830 } 831 break; 832 } 833 834 progressmeter(1); 835 if (closefunc != NULL) { 836 (*closefunc)(fin); 837 fin = NULL; 838 } 839 (void)fclose(dout); 840 dout = NULL; 841 (void)getreply(0); 842 if (bytes > 0) 843 ptransfer(0); 844 goto cleanupsend; 845 846 abort: 847 (void)xsignal(SIGINT, oldintr); 848 oldintr = NULL; 849 if (!cpend) { 850 code = -1; 851 goto cleanupsend; 852 } 853 if (data >= 0) { 854 (void)close(data); 855 data = -1; 856 } 857 if (dout) { 858 (void)fclose(dout); 859 dout = NULL; 860 } 861 (void)getreply(0); 862 code = -1; 863 if (bytes > 0) 864 ptransfer(0); 865 866 cleanupsend: 867 if (oldintr) 868 (void)xsignal(SIGINT, oldintr); 869 if (oldintp) 870 (void)xsignal(SIGPIPE, oldintp); 871 if (data >= 0) { 872 (void)close(data); 873 data = -1; 874 } 875 if (closefunc != NULL && fin != NULL) 876 (*closefunc)(fin); 877 if (dout) 878 (void)fclose(dout); 879 progress = oprogress; 880 restart_point = 0; 881 bytes = 0; 882 } 883 884 void 885 recvrequest(const char *cmd, const char *volatile local, const char *remote, 886 const char *lmode, int printnames, int ignorespecial) 887 { 888 FILE *volatile fout; 889 FILE *volatile din; 890 int (*volatile closefunc)(FILE *); 891 sigfunc volatile oldintr; 892 sigfunc volatile oldintp; 893 int c, d; 894 int volatile is_retr; 895 int volatile tcrflag; 896 int volatile bare_lfs; 897 static size_t bufsize; 898 static char *buf; 899 off_t volatile hashbytes; 900 int hash_interval; 901 struct stat st; 902 time_t mtime; 903 struct timeval tval[2]; 904 int oprogress; 905 int opreserve; 906 907 fout = NULL; 908 din = NULL; 909 hashbytes = mark; 910 direction = "received"; 911 bytes = 0; 912 bare_lfs = 0; 913 filesize = -1; 914 oprogress = progress; 915 opreserve = preserve; 916 is_retr = (strcmp(cmd, "RETR") == 0); 917 if (is_retr && verbose && printnames) { 918 if (ignorespecial || *local != '-') 919 fprintf(ttyout, "local: %s ", local); 920 if (remote) 921 fprintf(ttyout, "remote: %s\n", remote); 922 } 923 if (proxy && is_retr) { 924 proxtrans(cmd, local, remote); 925 return; 926 } 927 closefunc = NULL; 928 oldintr = NULL; 929 oldintp = NULL; 930 tcrflag = !crflag && is_retr; 931 if (sigsetjmp(xferabort, 1)) { 932 while (cpend) 933 (void)getreply(0); 934 code = -1; 935 goto cleanuprecv; 936 } 937 (void)xsignal(SIGQUIT, psummary); 938 oldintr = xsignal(SIGINT, abortxfer); 939 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 940 if (access(local, W_OK) < 0) { 941 char *dir = strrchr(local, '/'); 942 943 if (errno != ENOENT && errno != EACCES) { 944 warn("Can't access `%s'", local); 945 code = -1; 946 goto cleanuprecv; 947 } 948 if (dir != NULL) 949 *dir = 0; 950 d = access(dir == local ? "/" : 951 dir ? local : ".", W_OK); 952 if (dir != NULL) 953 *dir = '/'; 954 if (d < 0) { 955 warn("Can't access `%s'", local); 956 code = -1; 957 goto cleanuprecv; 958 } 959 if (!runique && errno == EACCES && 960 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 961 warn("Can't chmod `%s'", local); 962 code = -1; 963 goto cleanuprecv; 964 } 965 if (runique && errno == EACCES && 966 (local = gunique(local)) == NULL) { 967 code = -1; 968 goto cleanuprecv; 969 } 970 } 971 else if (runique && (local = gunique(local)) == NULL) { 972 code = -1; 973 goto cleanuprecv; 974 } 975 } 976 if (!is_retr) { 977 if (curtype != TYPE_A) 978 changetype(TYPE_A, 0); 979 } else { 980 if (curtype != type) 981 changetype(type, 0); 982 filesize = remotesize(remote, 0); 983 if (code == 421 || code == -1) 984 goto cleanuprecv; 985 } 986 if (initconn()) { 987 code = -1; 988 goto cleanuprecv; 989 } 990 if (sigsetjmp(xferabort, 1)) 991 goto abort; 992 if (is_retr && restart_point && 993 command("REST " LLF, (LLT) restart_point) != CONTINUE) 994 goto cleanuprecv; 995 if (! EMPTYSTRING(remote)) { 996 if (command("%s %s", cmd, remote) != PRELIM) 997 goto cleanuprecv; 998 } else { 999 if (command("%s", cmd) != PRELIM) 1000 goto cleanuprecv; 1001 } 1002 din = dataconn("r"); 1003 if (din == NULL) 1004 goto abort; 1005 if (!ignorespecial && strcmp(local, "-") == 0) { 1006 fout = stdout; 1007 progress = 0; 1008 preserve = 0; 1009 } else if (!ignorespecial && *local == '|') { 1010 oldintp = xsignal(SIGPIPE, SIG_IGN); 1011 fout = popen(local + 1, "w"); 1012 if (fout == NULL) { 1013 warn("Can't execute `%s'", local+1); 1014 goto abort; 1015 } 1016 progress = 0; 1017 preserve = 0; 1018 closefunc = pclose; 1019 } else { 1020 fout = fopen(local, lmode); 1021 if (fout == NULL) { 1022 warn("Can't open `%s'", local); 1023 goto abort; 1024 } 1025 closefunc = fclose; 1026 } 1027 1028 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1029 progress = 0; 1030 preserve = 0; 1031 } 1032 if (rcvbuf_size > bufsize) { 1033 if (buf) 1034 (void)free(buf); 1035 bufsize = rcvbuf_size; 1036 buf = ftp_malloc(bufsize); 1037 } 1038 1039 progressmeter(-1); 1040 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 1041 1042 switch (curtype) { 1043 1044 case TYPE_I: 1045 case TYPE_L: 1046 if (is_retr && restart_point && 1047 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1048 warn("Can't seek to restart `%s'", local); 1049 goto cleanuprecv; 1050 } 1051 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, 1052 rate_get, hash_interval); 1053 if (c == 1) { 1054 if (errno != EPIPE) 1055 warn("Reading from network"); 1056 bytes = -1; 1057 } else if (c == 2) { 1058 warn("Writing `%s'", local); 1059 } 1060 break; 1061 1062 case TYPE_A: 1063 if (is_retr && restart_point) { 1064 int ch; 1065 off_t i; 1066 1067 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1068 goto done; 1069 for (i = 0; i++ < restart_point;) { 1070 if ((ch = getc(fout)) == EOF) 1071 goto done; 1072 if (ch == '\n') 1073 i++; 1074 } 1075 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1076 done: 1077 warn("Can't seek to restart `%s'", local); 1078 goto cleanuprecv; 1079 } 1080 } 1081 while ((c = getc(din)) != EOF) { 1082 if (c == '\n') 1083 bare_lfs++; 1084 while (c == '\r') { 1085 while (hash_interval && bytes >= hashbytes) { 1086 (void)putc('#', ttyout); 1087 (void)fflush(ttyout); 1088 hashbytes += mark; 1089 } 1090 bytes++; 1091 if ((c = getc(din)) != '\n' || tcrflag) { 1092 if (ferror(fout)) 1093 goto break2; 1094 (void)putc('\r', fout); 1095 if (c == '\0') { 1096 bytes++; 1097 goto contin2; 1098 } 1099 if (c == EOF) 1100 goto contin2; 1101 } 1102 } 1103 (void)putc(c, fout); 1104 bytes++; 1105 contin2: ; 1106 } 1107 break2: 1108 if (hash_interval) { 1109 if (bytes < hashbytes) 1110 (void)putc('#', ttyout); 1111 (void)putc('\n', ttyout); 1112 } 1113 if (ferror(din)) { 1114 if (errno != EPIPE) 1115 warn("Reading from network"); 1116 bytes = -1; 1117 } 1118 if (ferror(fout)) 1119 warn("Writing `%s'", local); 1120 break; 1121 } 1122 1123 progressmeter(1); 1124 if (closefunc != NULL) { 1125 (*closefunc)(fout); 1126 fout = NULL; 1127 } 1128 (void)fclose(din); 1129 din = NULL; 1130 (void)getreply(0); 1131 if (bare_lfs) { 1132 fprintf(ttyout, 1133 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1134 bare_lfs); 1135 fputs("File may not have transferred correctly.\n", ttyout); 1136 } 1137 if (bytes >= 0 && is_retr) { 1138 if (bytes > 0) 1139 ptransfer(0); 1140 if (preserve && (closefunc == fclose)) { 1141 mtime = remotemodtime(remote, 0); 1142 if (mtime != -1) { 1143 (void)gettimeofday(&tval[0], NULL); 1144 tval[1].tv_sec = mtime; 1145 tval[1].tv_usec = 0; 1146 if (utimes(local, tval) == -1) { 1147 fprintf(ttyout, 1148 "Can't change modification time on %s to %s", 1149 local, 1150 rfc2822time(localtime(&mtime))); 1151 } 1152 } 1153 } 1154 } 1155 goto cleanuprecv; 1156 1157 abort: 1158 /* 1159 * abort using RFC0959 recommended IP,SYNC sequence 1160 */ 1161 if (! sigsetjmp(xferabort, 1)) { 1162 /* this is the first call */ 1163 (void)xsignal(SIGINT, abort_squared); 1164 if (!cpend) { 1165 code = -1; 1166 goto cleanuprecv; 1167 } 1168 abort_remote(din); 1169 } 1170 code = -1; 1171 if (bytes > 0) 1172 ptransfer(0); 1173 1174 cleanuprecv: 1175 if (oldintr) 1176 (void)xsignal(SIGINT, oldintr); 1177 if (oldintp) 1178 (void)xsignal(SIGPIPE, oldintp); 1179 if (data >= 0) { 1180 (void)close(data); 1181 data = -1; 1182 } 1183 if (closefunc != NULL && fout != NULL) 1184 (*closefunc)(fout); 1185 if (din) 1186 (void)fclose(din); 1187 progress = oprogress; 1188 preserve = opreserve; 1189 bytes = 0; 1190 } 1191 1192 /* 1193 * Need to start a listen on the data channel before we send the command, 1194 * otherwise the server's connect may fail. 1195 */ 1196 int 1197 initconn(void) 1198 { 1199 char *p, *a; 1200 int result, tmpno = 0; 1201 int on = 1; 1202 int error; 1203 unsigned int addr[16], port[2]; 1204 unsigned int af, hal, pal; 1205 socklen_t len; 1206 char *pasvcmd = NULL; 1207 int overbose; 1208 1209 #ifdef INET6 1210 #ifndef NO_DEBUG 1211 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1212 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1213 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1214 warnx("Use of scoped addresses can be troublesome"); 1215 } 1216 #endif 1217 #endif 1218 1219 reinit: 1220 if (passivemode) { 1221 data_addr = myctladdr; 1222 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1223 if (data < 0) { 1224 warn("Can't create socket for data connection"); 1225 return (1); 1226 } 1227 if ((options & SO_DEBUG) && 1228 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1229 (void *)&on, sizeof(on)) == -1) { 1230 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1231 } 1232 result = COMPLETE + 1; 1233 switch (data_addr.su_family) { 1234 case AF_INET: 1235 if (epsv4 && !epsv4bad) { 1236 pasvcmd = "EPSV"; 1237 overbose = verbose; 1238 if (ftp_debug == 0) 1239 verbose = -1; 1240 result = command("EPSV"); 1241 verbose = overbose; 1242 if (verbose > 0 && 1243 (result == COMPLETE || !connected)) 1244 fprintf(ttyout, "%s\n", reply_string); 1245 if (!connected) 1246 return (1); 1247 /* 1248 * this code is to be friendly with broken 1249 * BSDI ftpd 1250 */ 1251 if (code / 10 == 22 && code != 229) { 1252 fputs( 1253 "wrong server: return code must be 229\n", 1254 ttyout); 1255 result = COMPLETE + 1; 1256 } 1257 if (result != COMPLETE) { 1258 epsv4bad = 1; 1259 DPRINTF("disabling epsv4 for this " 1260 "connection\n"); 1261 } 1262 } 1263 if (result != COMPLETE) { 1264 pasvcmd = "PASV"; 1265 result = command("PASV"); 1266 if (!connected) 1267 return (1); 1268 } 1269 break; 1270 #ifdef INET6 1271 case AF_INET6: 1272 pasvcmd = "EPSV"; 1273 overbose = verbose; 1274 if (ftp_debug == 0) 1275 verbose = -1; 1276 result = command("EPSV"); 1277 verbose = overbose; 1278 if (verbose > 0 && 1279 (result == COMPLETE || !connected)) 1280 fprintf(ttyout, "%s\n", reply_string); 1281 if (!connected) 1282 return (1); 1283 /* this code is to be friendly with broken BSDI ftpd */ 1284 if (code / 10 == 22 && code != 229) { 1285 fputs( 1286 "wrong server: return code must be 229\n", 1287 ttyout); 1288 result = COMPLETE + 1; 1289 } 1290 if (result != COMPLETE) { 1291 pasvcmd = "LPSV"; 1292 result = command("LPSV"); 1293 } 1294 if (!connected) 1295 return (1); 1296 break; 1297 #endif 1298 default: 1299 result = COMPLETE + 1; 1300 break; 1301 } 1302 if (result != COMPLETE) { 1303 if (activefallback) { 1304 (void)close(data); 1305 data = -1; 1306 passivemode = 0; 1307 #if 0 1308 activefallback = 0; 1309 #endif 1310 goto reinit; 1311 } 1312 fputs("Passive mode refused.\n", ttyout); 1313 goto bad; 1314 } 1315 1316 #define pack2(var, off) \ 1317 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1318 #define pack4(var, off) \ 1319 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1320 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1321 #define UC(b) (((int)b)&0xff) 1322 1323 /* 1324 * What we've got at this point is a string of comma separated 1325 * one-byte unsigned integer values, separated by commas. 1326 */ 1327 if (strcmp(pasvcmd, "PASV") == 0) { 1328 if (data_addr.su_family != AF_INET) { 1329 fputs( 1330 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1331 error = 1; 1332 goto bad; 1333 } 1334 if (code / 10 == 22 && code != 227) { 1335 fputs("wrong server: return code must be 227\n", 1336 ttyout); 1337 error = 1; 1338 goto bad; 1339 } 1340 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1341 &addr[0], &addr[1], &addr[2], &addr[3], 1342 &port[0], &port[1]); 1343 if (error != 6) { 1344 fputs( 1345 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1346 error = 1; 1347 goto bad; 1348 } 1349 error = 0; 1350 memset(&data_addr, 0, sizeof(data_addr)); 1351 data_addr.su_family = AF_INET; 1352 data_addr.su_len = sizeof(struct sockaddr_in); 1353 data_addr.si_su.su_sin.sin_addr.s_addr = 1354 htonl(pack4(addr, 0)); 1355 data_addr.su_port = htons(pack2(port, 0)); 1356 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1357 if (code / 10 == 22 && code != 228) { 1358 fputs("wrong server: return code must be 228\n", 1359 ttyout); 1360 error = 1; 1361 goto bad; 1362 } 1363 switch (data_addr.su_family) { 1364 case AF_INET: 1365 error = sscanf(pasv, 1366 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1367 &af, &hal, 1368 &addr[0], &addr[1], &addr[2], &addr[3], 1369 &pal, &port[0], &port[1]); 1370 if (error != 9) { 1371 fputs( 1372 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1373 error = 1; 1374 goto bad; 1375 } 1376 if (af != 4 || hal != 4 || pal != 2) { 1377 fputs( 1378 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1379 error = 1; 1380 goto bad; 1381 } 1382 1383 error = 0; 1384 memset(&data_addr, 0, sizeof(data_addr)); 1385 data_addr.su_family = AF_INET; 1386 data_addr.su_len = sizeof(struct sockaddr_in); 1387 data_addr.si_su.su_sin.sin_addr.s_addr = 1388 htonl(pack4(addr, 0)); 1389 data_addr.su_port = htons(pack2(port, 0)); 1390 break; 1391 #ifdef INET6 1392 case AF_INET6: 1393 error = sscanf(pasv, 1394 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1395 &af, &hal, 1396 &addr[0], &addr[1], &addr[2], &addr[3], 1397 &addr[4], &addr[5], &addr[6], &addr[7], 1398 &addr[8], &addr[9], &addr[10], 1399 &addr[11], &addr[12], &addr[13], 1400 &addr[14], &addr[15], 1401 &pal, &port[0], &port[1]); 1402 if (error != 21) { 1403 fputs( 1404 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1405 error = 1; 1406 goto bad; 1407 } 1408 if (af != 6 || hal != 16 || pal != 2) { 1409 fputs( 1410 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1411 error = 1; 1412 goto bad; 1413 } 1414 1415 error = 0; 1416 memset(&data_addr, 0, sizeof(data_addr)); 1417 data_addr.su_family = AF_INET6; 1418 data_addr.su_len = sizeof(struct sockaddr_in6); 1419 { 1420 int i; 1421 for (i = 0; i < sizeof(struct in6_addr); i++) { 1422 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1423 UC(addr[i]); 1424 } 1425 } 1426 data_addr.su_port = htons(pack2(port, 0)); 1427 break; 1428 #endif 1429 default: 1430 error = 1; 1431 } 1432 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1433 char delim[4]; 1434 1435 port[0] = 0; 1436 if (code / 10 == 22 && code != 229) { 1437 fputs("wrong server: return code must be 229\n", 1438 ttyout); 1439 error = 1; 1440 goto bad; 1441 } 1442 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1443 &delim[1], &delim[2], &port[1], 1444 &delim[3]) != 5) { 1445 fputs("parse error!\n", ttyout); 1446 error = 1; 1447 goto bad; 1448 } 1449 if (delim[0] != delim[1] || delim[0] != delim[2] 1450 || delim[0] != delim[3]) { 1451 fputs("parse error!\n", ttyout); 1452 error = 1; 1453 goto bad; 1454 } 1455 data_addr = hisctladdr; 1456 data_addr.su_port = htons(port[1]); 1457 } else 1458 goto bad; 1459 1460 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1461 data_addr.su_len) < 0) { 1462 if (activefallback) { 1463 (void)close(data); 1464 data = -1; 1465 passivemode = 0; 1466 #if 0 1467 activefallback = 0; 1468 #endif 1469 goto reinit; 1470 } 1471 goto bad; 1472 } 1473 #ifdef IPTOS_THROUGHPUT 1474 if (data_addr.su_family == AF_INET) { 1475 on = IPTOS_THROUGHPUT; 1476 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1477 (void *)&on, sizeof(on)) == -1) { 1478 DWARN("setsockopt %s (ignored)", 1479 "IPTOS_THROUGHPUT"); 1480 } 1481 } 1482 #endif 1483 return (0); 1484 } 1485 1486 noport: 1487 data_addr = myctladdr; 1488 if (sendport) 1489 data_addr.su_port = 0; /* let system pick one */ 1490 if (data != -1) 1491 (void)close(data); 1492 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1493 if (data < 0) { 1494 warn("Can't create socket for data connection"); 1495 if (tmpno) 1496 sendport = 1; 1497 return (1); 1498 } 1499 if (!sendport) 1500 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1501 (void *)&on, sizeof(on)) == -1) { 1502 warn("Can't set SO_REUSEADDR on data connection"); 1503 goto bad; 1504 } 1505 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1506 data_addr.su_len) < 0) { 1507 warn("Can't bind for data connection"); 1508 goto bad; 1509 } 1510 if ((options & SO_DEBUG) && 1511 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1512 (void *)&on, sizeof(on)) == -1) { 1513 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1514 } 1515 len = sizeof(data_addr.si_su); 1516 memset((char *)&data_addr, 0, sizeof (data_addr)); 1517 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1518 warn("Can't determine my address of data connection"); 1519 goto bad; 1520 } 1521 data_addr.su_len = len; 1522 if (ftp_listen(data, 1) < 0) 1523 warn("Can't listen to data connection"); 1524 1525 if (sendport) { 1526 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1527 int af; 1528 struct sockinet tmp; 1529 1530 switch (data_addr.su_family) { 1531 case AF_INET: 1532 if (!epsv4 || epsv4bad) { 1533 result = COMPLETE + 1; 1534 break; 1535 } 1536 /* FALLTHROUGH */ 1537 #ifdef INET6 1538 case AF_INET6: 1539 #endif 1540 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1541 tmp = data_addr; 1542 #ifdef INET6 1543 if (tmp.su_family == AF_INET6) 1544 tmp.si_su.su_sin6.sin6_scope_id = 0; 1545 #endif 1546 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1547 tmp.su_len, hname, sizeof(hname), sname, 1548 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1549 result = ERROR; 1550 } else { 1551 overbose = verbose; 1552 if (ftp_debug == 0) 1553 verbose = -1; 1554 result = command("EPRT |%d|%s|%s|", af, hname, 1555 sname); 1556 verbose = overbose; 1557 if (verbose > 0 && 1558 (result == COMPLETE || !connected)) 1559 fprintf(ttyout, "%s\n", reply_string); 1560 if (!connected) 1561 return (1); 1562 if (result != COMPLETE) { 1563 epsv4bad = 1; 1564 DPRINTF("disabling epsv4 for this " 1565 "connection\n"); 1566 } 1567 } 1568 break; 1569 default: 1570 result = COMPLETE + 1; 1571 break; 1572 } 1573 if (result == COMPLETE) 1574 goto skip_port; 1575 1576 switch (data_addr.su_family) { 1577 case AF_INET: 1578 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1579 p = (char *)&data_addr.su_port; 1580 result = command("PORT %d,%d,%d,%d,%d,%d", 1581 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1582 UC(p[0]), UC(p[1])); 1583 break; 1584 #ifdef INET6 1585 case AF_INET6: 1586 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1587 p = (char *)&data_addr.su_port; 1588 result = command( 1589 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1590 6, 16, 1591 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1592 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1593 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1594 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1595 2, UC(p[0]), UC(p[1])); 1596 break; 1597 #endif 1598 default: 1599 result = COMPLETE + 1; /* xxx */ 1600 } 1601 if (!connected) 1602 return (1); 1603 skip_port: 1604 1605 if (result == ERROR && sendport == -1) { 1606 sendport = 0; 1607 tmpno = 1; 1608 goto noport; 1609 } 1610 return (result != COMPLETE); 1611 } 1612 if (tmpno) 1613 sendport = 1; 1614 #ifdef IPTOS_THROUGHPUT 1615 if (data_addr.su_family == AF_INET) { 1616 on = IPTOS_THROUGHPUT; 1617 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1618 (void *)&on, sizeof(on)) == -1) 1619 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1620 } 1621 #endif 1622 return (0); 1623 bad: 1624 (void)close(data); 1625 data = -1; 1626 if (tmpno) 1627 sendport = 1; 1628 return (1); 1629 } 1630 1631 FILE * 1632 dataconn(const char *lmode) 1633 { 1634 struct sockinet from; 1635 int s, flags, rv, timeout; 1636 struct timeval endtime, now, td; 1637 struct pollfd pfd[1]; 1638 socklen_t fromlen; 1639 1640 if (passivemode) /* passive data connection */ 1641 return (fdopen(data, lmode)); 1642 1643 /* active mode data connection */ 1644 1645 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1646 goto dataconn_failed; /* get current socket flags */ 1647 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1648 goto dataconn_failed; /* set non-blocking connect */ 1649 1650 /* NOTE: we now must restore socket flags on successful exit */ 1651 1652 /* limit time waiting on listening socket */ 1653 pfd[0].fd = data; 1654 pfd[0].events = POLLIN; 1655 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1656 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1657 /* without -q, default to 60s */ 1658 do { 1659 (void)gettimeofday(&now, NULL); 1660 timersub(&endtime, &now, &td); 1661 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1662 if (timeout < 0) 1663 timeout = 0; 1664 rv = ftp_poll(pfd, 1, timeout); 1665 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1666 if (rv == -1) { 1667 warn("Can't poll waiting before accept"); 1668 goto dataconn_failed; 1669 } 1670 if (rv == 0) { 1671 warnx("Poll timeout waiting before accept"); 1672 goto dataconn_failed; 1673 } 1674 1675 /* (non-blocking) accept the connection */ 1676 fromlen = myctladdr.su_len; 1677 do { 1678 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1679 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1680 if (s == -1) { 1681 warn("Can't accept data connection"); 1682 goto dataconn_failed; 1683 } 1684 1685 (void)close(data); 1686 data = s; 1687 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1688 goto dataconn_failed; 1689 1690 #ifdef IPTOS_THROUGHPUT 1691 if (from.su_family == AF_INET) { 1692 int tos = IPTOS_THROUGHPUT; 1693 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1694 (void *)&tos, sizeof(tos)) == -1) { 1695 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1696 } 1697 } 1698 #endif 1699 return (fdopen(data, lmode)); 1700 1701 dataconn_failed: 1702 (void)close(data); 1703 data = -1; 1704 return (NULL); 1705 } 1706 1707 void 1708 psabort(int notused) 1709 { 1710 int oerrno = errno; 1711 1712 sigint_raised = 1; 1713 alarmtimer(0); 1714 abrtflag++; 1715 errno = oerrno; 1716 } 1717 1718 void 1719 pswitch(int flag) 1720 { 1721 sigfunc oldintr; 1722 static struct comvars { 1723 int connect; 1724 char name[MAXHOSTNAMELEN]; 1725 struct sockinet mctl; 1726 struct sockinet hctl; 1727 FILE *in; 1728 FILE *out; 1729 int tpe; 1730 int curtpe; 1731 int cpnd; 1732 int sunqe; 1733 int runqe; 1734 int mcse; 1735 int ntflg; 1736 char nti[17]; 1737 char nto[17]; 1738 int mapflg; 1739 char mi[MAXPATHLEN]; 1740 char mo[MAXPATHLEN]; 1741 } proxstruct, tmpstruct; 1742 struct comvars *ip, *op; 1743 1744 abrtflag = 0; 1745 oldintr = xsignal(SIGINT, psabort); 1746 if (flag) { 1747 if (proxy) 1748 return; 1749 ip = &tmpstruct; 1750 op = &proxstruct; 1751 proxy++; 1752 } else { 1753 if (!proxy) 1754 return; 1755 ip = &proxstruct; 1756 op = &tmpstruct; 1757 proxy = 0; 1758 } 1759 ip->connect = connected; 1760 connected = op->connect; 1761 if (hostname) 1762 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1763 else 1764 ip->name[0] = '\0'; 1765 hostname = op->name; 1766 ip->hctl = hisctladdr; 1767 hisctladdr = op->hctl; 1768 ip->mctl = myctladdr; 1769 myctladdr = op->mctl; 1770 ip->in = cin; 1771 cin = op->in; 1772 ip->out = cout; 1773 cout = op->out; 1774 ip->tpe = type; 1775 type = op->tpe; 1776 ip->curtpe = curtype; 1777 curtype = op->curtpe; 1778 ip->cpnd = cpend; 1779 cpend = op->cpnd; 1780 ip->sunqe = sunique; 1781 sunique = op->sunqe; 1782 ip->runqe = runique; 1783 runique = op->runqe; 1784 ip->mcse = mcase; 1785 mcase = op->mcse; 1786 ip->ntflg = ntflag; 1787 ntflag = op->ntflg; 1788 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1789 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1790 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1791 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1792 ip->mapflg = mapflag; 1793 mapflag = op->mapflg; 1794 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1795 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1796 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1797 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1798 (void)xsignal(SIGINT, oldintr); 1799 if (abrtflag) { 1800 abrtflag = 0; 1801 (*oldintr)(SIGINT); 1802 } 1803 } 1804 1805 void 1806 abortpt(int notused) 1807 { 1808 1809 sigint_raised = 1; 1810 alarmtimer(0); 1811 if (fromatty) 1812 write(fileno(ttyout), "\n", 1); 1813 ptabflg++; 1814 mflag = 0; 1815 abrtflag = 0; 1816 siglongjmp(ptabort, 1); 1817 } 1818 1819 void 1820 proxtrans(const char *cmd, const char *local, const char *remote) 1821 { 1822 sigfunc volatile oldintr; 1823 int prox_type, nfnd; 1824 int volatile secndflag; 1825 char *volatile cmd2; 1826 1827 oldintr = NULL; 1828 secndflag = 0; 1829 if (strcmp(cmd, "RETR")) 1830 cmd2 = "RETR"; 1831 else 1832 cmd2 = runique ? "STOU" : "STOR"; 1833 if ((prox_type = type) == 0) { 1834 if (unix_server && unix_proxy) 1835 prox_type = TYPE_I; 1836 else 1837 prox_type = TYPE_A; 1838 } 1839 if (curtype != prox_type) 1840 changetype(prox_type, 1); 1841 if (command("PASV") != COMPLETE) { 1842 fputs("proxy server does not support third party transfers.\n", 1843 ttyout); 1844 return; 1845 } 1846 pswitch(0); 1847 if (!connected) { 1848 fputs("No primary connection.\n", ttyout); 1849 pswitch(1); 1850 code = -1; 1851 return; 1852 } 1853 if (curtype != prox_type) 1854 changetype(prox_type, 1); 1855 if (command("PORT %s", pasv) != COMPLETE) { 1856 pswitch(1); 1857 return; 1858 } 1859 if (sigsetjmp(ptabort, 1)) 1860 goto abort; 1861 oldintr = xsignal(SIGINT, abortpt); 1862 if ((restart_point && 1863 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1864 || (command("%s %s", cmd, remote) != PRELIM)) { 1865 (void)xsignal(SIGINT, oldintr); 1866 pswitch(1); 1867 return; 1868 } 1869 sleep(2); 1870 pswitch(1); 1871 secndflag++; 1872 if ((restart_point && 1873 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1874 || (command("%s %s", cmd2, local) != PRELIM)) 1875 goto abort; 1876 ptflag++; 1877 (void)getreply(0); 1878 pswitch(0); 1879 (void)getreply(0); 1880 (void)xsignal(SIGINT, oldintr); 1881 pswitch(1); 1882 ptflag = 0; 1883 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1884 return; 1885 abort: 1886 if (sigsetjmp(xferabort, 1)) { 1887 (void)xsignal(SIGINT, oldintr); 1888 return; 1889 } 1890 (void)xsignal(SIGINT, abort_squared); 1891 ptflag = 0; 1892 if (strcmp(cmd, "RETR") && !proxy) 1893 pswitch(1); 1894 else if (!strcmp(cmd, "RETR") && proxy) 1895 pswitch(0); 1896 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1897 if (command("%s %s", cmd2, local) != PRELIM) { 1898 pswitch(0); 1899 if (cpend) 1900 abort_remote(NULL); 1901 } 1902 pswitch(1); 1903 if (ptabflg) 1904 code = -1; 1905 (void)xsignal(SIGINT, oldintr); 1906 return; 1907 } 1908 if (cpend) 1909 abort_remote(NULL); 1910 pswitch(!proxy); 1911 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1912 if (command("%s %s", cmd2, local) != PRELIM) { 1913 pswitch(0); 1914 if (cpend) 1915 abort_remote(NULL); 1916 pswitch(1); 1917 if (ptabflg) 1918 code = -1; 1919 (void)xsignal(SIGINT, oldintr); 1920 return; 1921 } 1922 } 1923 if (cpend) 1924 abort_remote(NULL); 1925 pswitch(!proxy); 1926 if (cpend) { 1927 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1928 if (nfnd < 0) 1929 warn("Error aborting proxy command"); 1930 if (ptabflg) 1931 code = -1; 1932 lostpeer(0); 1933 } 1934 (void)getreply(0); 1935 (void)getreply(0); 1936 } 1937 if (proxy) 1938 pswitch(0); 1939 pswitch(1); 1940 if (ptabflg) 1941 code = -1; 1942 (void)xsignal(SIGINT, oldintr); 1943 } 1944 1945 void 1946 reset(int argc, char *argv[]) 1947 { 1948 int nfnd = 1; 1949 1950 if (argc == 0 && argv != NULL) { 1951 UPRINTF("usage: %s\n", argv[0]); 1952 code = -1; 1953 return; 1954 } 1955 while (nfnd > 0) { 1956 if ((nfnd = empty(cin, NULL, 0)) < 0) { 1957 warn("Error resetting connection"); 1958 code = -1; 1959 lostpeer(0); 1960 } else if (nfnd) 1961 (void)getreply(0); 1962 } 1963 } 1964 1965 char * 1966 gunique(const char *local) 1967 { 1968 static char new[MAXPATHLEN]; 1969 char *cp = strrchr(local, '/'); 1970 int d, count=0, len; 1971 char ext = '1'; 1972 1973 if (cp) 1974 *cp = '\0'; 1975 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 1976 if (cp) 1977 *cp = '/'; 1978 if (d < 0) { 1979 warn("Can't access `%s'", local); 1980 return (NULL); 1981 } 1982 len = strlcpy(new, local, sizeof(new)); 1983 cp = &new[len]; 1984 *cp++ = '.'; 1985 while (!d) { 1986 if (++count == 100) { 1987 fputs("runique: can't find unique file name.\n", 1988 ttyout); 1989 return (NULL); 1990 } 1991 *cp++ = ext; 1992 *cp = '\0'; 1993 if (ext == '9') 1994 ext = '0'; 1995 else 1996 ext++; 1997 if ((d = access(new, F_OK)) < 0) 1998 break; 1999 if (ext != '0') 2000 cp--; 2001 else if (*(cp - 2) == '.') 2002 *(cp - 1) = '1'; 2003 else { 2004 *(cp - 2) = *(cp - 2) + 1; 2005 cp--; 2006 } 2007 } 2008 return (new); 2009 } 2010 2011 /* 2012 * abort_squared -- 2013 * aborts abort_remote(). lostpeer() is called because if the user is 2014 * too impatient to wait or there's another problem then ftp really 2015 * needs to get back to a known state. 2016 */ 2017 void 2018 abort_squared(int dummy) 2019 { 2020 char msgbuf[100]; 2021 size_t len; 2022 2023 sigint_raised = 1; 2024 alarmtimer(0); 2025 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2026 sizeof(msgbuf)); 2027 write(fileno(ttyout), msgbuf, len); 2028 lostpeer(0); 2029 siglongjmp(xferabort, 1); 2030 } 2031 2032 void 2033 abort_remote(FILE *din) 2034 { 2035 char buf[BUFSIZ]; 2036 int nfnd; 2037 2038 if (cout == NULL) { 2039 warnx("Lost control connection for abort"); 2040 if (ptabflg) 2041 code = -1; 2042 lostpeer(0); 2043 return; 2044 } 2045 /* 2046 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2047 * after urgent byte rather than before as is protocol now 2048 */ 2049 buf[0] = IAC; 2050 buf[1] = IP; 2051 buf[2] = IAC; 2052 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2053 warn("Can't send abort message"); 2054 fprintf(cout, "%cABOR\r\n", DM); 2055 (void)fflush(cout); 2056 if ((nfnd = empty(cin, din, 10)) <= 0) { 2057 if (nfnd < 0) 2058 warn("Can't send abort message"); 2059 if (ptabflg) 2060 code = -1; 2061 lostpeer(0); 2062 } 2063 if (din && (nfnd & 2)) { 2064 while (read(fileno(din), buf, BUFSIZ) > 0) 2065 continue; 2066 } 2067 if (getreply(0) == ERROR && code == 552) { 2068 /* 552 needed for nic style abort */ 2069 (void)getreply(0); 2070 } 2071 (void)getreply(0); 2072 } 2073 2074 /* 2075 * Ensure that ai->ai_addr is NOT an IPv4 mapped address. 2076 * IPv4 mapped address complicates too many things in FTP 2077 * protocol handling, as FTP protocol is defined differently 2078 * between IPv4 and IPv6. 2079 * 2080 * This may not be the best way to handle this situation, 2081 * since the semantics of IPv4 mapped address is defined in 2082 * the kernel. There are configurations where we should use 2083 * IPv4 mapped address as native IPv6 address, not as 2084 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 2085 * 2086 * More complete solution would be to have an additional 2087 * getsockopt to grab "real" peername/sockname. "real" 2088 * peername/sockname will be AF_INET if IPv4 mapped address 2089 * is used to embed IPv4 address, and will be AF_INET6 if 2090 * we use it as native. What a mess! 2091 */ 2092 void 2093 ai_unmapped(struct addrinfo *ai) 2094 { 2095 #ifdef INET6 2096 struct sockaddr_in6 *sin6; 2097 struct sockaddr_in sin; 2098 socklen_t len; 2099 2100 if (ai->ai_family != AF_INET6) 2101 return; 2102 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2103 sizeof(sin) > ai->ai_addrlen) 2104 return; 2105 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2106 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2107 return; 2108 2109 memset(&sin, 0, sizeof(sin)); 2110 sin.sin_family = AF_INET; 2111 len = sizeof(struct sockaddr_in); 2112 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2113 sizeof(sin.sin_addr)); 2114 sin.sin_port = sin6->sin6_port; 2115 2116 ai->ai_family = AF_INET; 2117 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 2118 sin.sin_len = len; 2119 #endif 2120 memcpy(ai->ai_addr, &sin, len); 2121 ai->ai_addrlen = len; 2122 #endif 2123 } 2124 2125 #ifdef NO_USAGE 2126 void 2127 xusage(void) 2128 { 2129 fputs("Usage error\n", ttyout); 2130 } 2131 #endif 2132